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@uitrit tftsrtrs gattini @ffice IVVIIlFJll-JIAIU: MCMILLN AND STEPHEN DEVOE, OF NElV YORK, Y.

` Letters Patent 1Y0. (37,785, (lated August 13, 1867. i

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i TO ALL WHOM IT MAY CONCER: y y

Be it known that, we, S. DEVOB :1nd W. II. MCMILLAN, of the city, county, and State of New York, have i invented a. new und improved Tool; :md we do hereby declare that the following is a full, clear, and exact description thereof, hich will enable others skilled in the art to male and use vthe same, reference being had to the accompanying draxvings, forming :x part of this specification. d

The present invention relates to n. tool, or centre-hit, or drill, more especially intended for the turning or v'boring out of dead-eyes, bull-eyes, leading-trucks, and similar parts employed'in the manufacture of ships sails, and used about the rigging of ships, and for the rounding of the sheaves, and vharing out the seat for the fbushings thereto. In the accompanying plate of drawings our improved tool is illustrated- .Figures 1, 2, and 3, being side views of our improved tool, hut showing different forms of the same, and

Figures 4, 5, and 6, views of the boring ends of the tools or centre-bits, shown in side elevation respectively in figs. 1, 2, and 3. l d

Similar letters of reference indicate corresponding parts.

A, in the drawings, represents the shank or stem to the tool or centre-hit, tnt-.de ef suitable shape atone end to he secured in' any socket or holder adapted to receive it, but, at its other end, of the shape to produce or cut out the desired article, such as, for instance, a dead-eye" from a block of wood of the requisite size. The cutting edge B of the tool, shown in fig. 1, is such as to cut from a solid block of wood, by subjecting hotll sides of the sume to its action, n block, shown by red lines in said figure, with rounded edges; the tool cutting from its centre to its extreme outer ends in both directions, and having a suitable centre-point, C, for centring .it upon the block.' In iig. 2 a. tool is shown as provided with a centre-cutter or edge, D, with the cutting-edge of the tool from such centre cutting edge of a similar concave shape upon each side of the same, and extending 'outward to its extreme ends. A tool with the cutting edge, shown in iig. 2, being such as to produce or to cut out from a solid block a. dead-eye, so culled. In fig. 3 a tool is shown with a similar centre cutter to that shown in fig. 2, but with a portion upon each side of such centre-cutter made with a. cutting edge, which cutting edge extends from z z on each side.

Having thus described my invention, I claim as new, and desire to secure by LettersPatent- A centre-bit or tool constructed and provided with n. cutting edge, substnntilly'as and for the purpose described.

WM. H. McMILLAN,

- STEPHEN DEVOE. Witnesses:

WM. F. McNAMAuA, ALEX. F. Renners. 

